Improvement in spark-aibester



N.PETERS. PMOTOvLiTMOGRAPHER. WASHINGTON, D o.

'.A. F. SMITH, OF ELLSWORTH, MAINE, ASSIGNOR TO HIMSELF AND LEWIS FRIEND, OF SAME PLAGE.

Letters Patent No. 80,229, dated Juzg, 21,1868.

IMPROVEMENT Ilil' SPABK-ARRESTER.

TO ALL WII-OM IT MAY CONCERN:

Be it known that I, A. F. SMI'TH, of Ellsworth, in the county of Hancock, andS-tate of Maine,have invented a new and useful Improvement in Spark-Arresters; and I do .hereby-declare that the following is a full, clear,` and exact description thereof, whichwill enable others skilled in the art to. make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which- Figure l is a side view of myinvention.

Figure 2 is a vertical section of the same, taken in the line z z, Iig. 1.

Similar letters of reference indicate corresponding parts.

This invention relates to a new and improved spark-arrester, to be applied to the smoke-stacksof locomo.- tives, chimneys, Ste., for the purpose of preventing the escape of sparks therefrom. i

The invention consists in the peculiar construction of the device as hereinafter fully shown and described, whereby a good or ciicient draught is obtained to insure the escape of smoke,.and the cinders at the same time preventedfrompassing out ofthe device. I y The spark-arrester is composed of two parts, A B, connected by a hinge, a. The lower part, A, whieh is secured to the smoke-stack or chimney, is of inverted conical form, and has within it a shell, C, of invertedbowl form, and secured in position by arms a', attached to the inner surface of A, as shown clearly in fig. 2. The shell C is open'at the top and bottom, and has perfdrations 5 iny its sides, covered with wire cloth c.

i I) represents tubes', which are fitted wit-hin the part A, "extend up by the side of the perforations b, and communicatewith the external air.

E represents a cap, which is placed within the part B, and retained in proper position by arms c', as shown in fig. 2. This cap is directly over the top ofthe shell (l, and it is perforated with a series ot' seinicircnlar slots, d, which will admit `of' smoke passing through, but not the cinders.

Directly over the cap E there is a wire-gauze chamber, F, which is fitted tightly inthe top of the part B, and over this wire-gauze chamber F there is a plate, G, having a circular aperture, c, at itsA centre, which isl covered'by a cap, f. y

' In the side oi' the upper part of B there are made circular openings, g,'eovercd with wire cloth, k, and

having plates z' at their outer sides, te shield said openings from the wind.

H is a vane, the pivot of which is at the centre of plate G. This vane has a shield'or plate, I, attached to one end of it, said shield or plate extendingr down below the exposed surface of the wire-gauze chamber F. This shield protects the Windward side of the chamber F from the action of the wind.

The smoke and cinders pass up into the lower part of A, through the shell C, around the sides of the same, and through the perforations Z ofthe shell, Ythe smokeY passing into the wiregauze chamber F, but .not the cin,- ders, the wire gauze excluding them. The greater portion of the cinders pass directly up throughlthe shell C,

strike the cap E, and are deiieeted downward. The tubes D increase the draught in the device, and-render it very eilicient in its operation. A portion of the smoke escapes through the opening g in B. The platcz' of the opening g, and the shield I of the vane, prevent the wind from acting unfavorably upon the draught.

Having thus described my invention, I claim as new, and desire to'secure by Letters Patent- 1. -The two parts A B, the shell C, cap E, and the wire-gauze chamber F, with the openings b in shell C, and the openingsg in the upper part B, covered with wire cloth, all combined and arranged substantially as and for the purpose set forth. v

2. The draught-tubes B, placed in the lower part, A, of the device, and the openings b in the shell, arranged to operate substantially as and for the purpose specified. l V Y l 3. The shield I, attached to the vane I-I, and arranged in relation with the wire-gauzeehamber F, substantially as and for thc purpose set forth.

A. F. SMITH.

Witnesses:

A.. F, DUxKwATnR, J. F. DAvrs. 

